We report our early experience with a new device for endoscopic stone disintegration: the Swiss lithoclast. This device was used to treat 200 patients with stones in kidney, ureter, and bladder. Its effectiveness was 100% when the stone could be approached irrespective of size or composition, and no complication was encountered. Prof. A. Kostakopoulos, Department of Urology, Sismanoglion Genera...

An involutive Stone algebra (IS-algebra) is simultaneously a De Morgan and (i.e., pseudo-complemented distributive lattice satisfying the identity $$\mathop {\sim }x \vee \mathop }\mathop \approx 1$$ ). IS-algebras have been studied algebraically topologically since 1980s, but corresponding logic (here denoted $$\mathcal {IS}_{\le }$$ ) has introduced only very recently. This departing point of...

Graphical Abstract “My favorite science outreach activity is meeting with young people at fairs to answer the questions they have about world around them (not always easy but often inspiring) … I chose chemistry as a career because you transform and model matter scale of molecule, imperceptible human beings until very recently in our history. …” Find out more Morgan Donnard his Introducing Prof...

I shall start by explaining just what “semi-infinite” means and how it gives rise to interesting structures in geometry. These structures are studied as part of String Theory and are closely related to Floer Theory. Manifolds which carry a “semi-infinite” structure include loop spaces (C∞(S1, M) for M a closed manifold) and the theory seems to have particular simplicities when the original mani...